Time to look around again I guess, I've never looked into BSD, Hurd, Solaris...
The GNU Hurd is probably not going to be for you unless you have Ethernet and an old thinkpad or dell laptop. In the mailing list, I know the main devs are usually against ai contributions, although I am unaware if they have a policy.
I would recommend using netBSD because the devs have a clear stance on no rust and no llm usage. There is also openBSD which has the best code quality of the three BSD's, and I think had 2 vulnerabilities in a decade.